From the implementation in university classes with about 19-21 years old, our interviews with five lecturers and their answers in an online questionnaire showed that the OER material in learning did provide many benefits for lecturers and students, including the variety of materials, the forms, and the economic aspect. However, the existing OER still have some downsides, like their suitability to the needs of lecturers and students, in terms of their themes, the technical requirements and levels of difficulty.
